Well-reamer.



PATENTBD MARA-3, 1906. .,SAGER.l :WELL BEAMER;

APPLICATION YILED 00T. 6, 1905.

2 SHEETS-SHEET 1.

H. 11. HA'RDSNBURG 1 F 012." PATLNTLD MALtisQlQoe.

- H. R. HARDLNBURGYLL P, SAGBRT' WLLL BEAMER. A APPLIGATION FILED 00T. s, 1905.l

2 SHEETS-SHELL' z.

2 @memoire y' marleen@ United?. seres-,hmmm a@ Saginaw, reihe:

5 :county jf-Saginaw 'and State. of..Miohi en, heve'fnvente :icertain new-and-nseful` m'- erebygdeclerethe, folloW-in ,to f

clear, and exact description o th` f which fit-eppertains to inekev and use the 'Swine'reference being. hed tothe accomperiy-` y"ingadres/ringe',- end. to the-letters of reference x5 cetion.`f. v l i-'f-.1"nis invention eletes to reemers forvuse inrlrilling oil end other'deepyvells,` and' has .iforits object -theiconstruction-ofstreamer thetWil-l-expend `when it passes down beyond the endA of the ,Well'fcasingin order Ito -reem `the hole out' large enough to permit the' lowering of ythe casing? 'sind Awhen it is; desired to' lerew ont the real ner that it will contact snli-` eiently to `'essfup through'. the Well-casing.

In the diilling of oil endothe'r dee Wells Wherethere `stre deep strata. of sand an other loose materielthat will ceveinto .the hole. it =is=ci1st1neryito sink a ycasing-pipe into the hole es fest as' the'wellis drilled; and the drill `usedin boring theim'tiel hole of vnecessity l must pass down throu h thecasing,end'the1e fore Willnot here a ho efof sul'cient diameter to permittli'e'casing to beloWered. Therefore it becomes necessary-to ream the hole lar er1 below thecesin and it is to aceoinplish t is purpose that-'tie 'present invention is designed. y

LThe menne-r oeonstructing e reemer ern# bodyin this invention and the features there- 'oi are ereinefter set forth-and explained, and illustrated 'in the accompanying drawin s, in Which- .igure 1 is a. View in elevation of' a reamer constructed according to this invention within e Wellcasing, the bits thereof having passed below the casing lend expanded to reem the hole'lerger for the easing. Fig. 2 is e like view of the'same with the bits contracted bythe cesin .eethe rearner is' being Withdrawn from t e Well. F ig. 3 is` a vertical section of the body portion oi'- the rentner with 'the operative parts removed. Fig. is :i like section ofthe same, showing the arrangement of the operative parts thereon. Fig. 5 .is u,

enclins-Will ene-ble others skilledi 'the art to eon,.forrning.pert of this specifi- .p y Specicetion of Iietters 'Patent f. lkippneeimiinsa-octoim6,1905. .sei-'mino zal-.65s.

I planI j vievv yof one `of 'the` bits .provided with" the usual screw L in (L, by 'l means of which it is secured te the rillr'yste'm.

.to itsiippen end `end also lanother-ce edjeoentto-the lower end thereof. Longitl'innfrrnnr sfnrrES; PMEMOFFICErv j howl/irren. #menen-Brine. AND FeEnnieK'sAeEizl! oF'sAeiNAwf '.r-.MioHIGANp 'e .i i. wEL'L-BMER. Y'

laten/ea Maffei; -1 3,- 190e.y

manner of connecting the spring-link t ere# to. Fig. 6' is across-section lofthe seine "on l f the line a: :ein 4. Fig.- 'Z is a plan view of .the lower end of the-reamer, showing; the e1"- 6c AIn theQconstruction of e reamer embody` rangement of .the bitsVv inthe inclined yWays'.

ing this vinvention the A'body portion A of the reameris of solid metal, the 'upper end. being -dinel slots a* af; having shouldersettheir updownto enoifsetor shoulder ainseid slots, from.'whichpointfthiseid slots a4 gradually [increase vin depth until the'wrlljbetween themf '7 5 'at the'lower end of the-body portion is'very thin. The flower y.end ofthe' body portion A below the coller ,aaisfecedol en th'e 'sidee in .-Whichlthe slots at dfe'reent; so este be somej what lWed e-shaped and these Wedge facesere the channels tla .and 'depth of theslots d", sol

channel@ ont, :is at of',jwithithesidestlliereof, a7, nndercut, esfshW/n in Fig. 7 ,i and et the p oint a the metal forming theside walls' of i as' to form shoulders or offsets Mfthereinor,

in other words, increase `the Widthof the slots a#4 afbelow the shoulders aa to the full width of the undercut of the chennelsel. The ilp- .per ends of the channels a" terminate in underplaine l Withinfthe'undercut sides'tc ol' thechennels a" a are 'placed bits B B, (see Fig. 5,)

vwhich ere provided with longitudinal splines I or ribsb lbon: their sides, adapted to fit thev undercut Ysides 'a7 `ol? the channels a, The upper endsol these'bits B B are' beveled ofl preferably to Alit vthe undercut shoulders A A in the-collara, and they have 'also re- Acessesib'z cut in their upper ends, which re cesscs have contracted openings in the`ir up )er walls. Within these recesses [r1 in the bits @ere then placed spring-links C (j, hevint,r enlarged lower ends Ol and the upper IOO of the reamer and is then compressed until the u per end of the spring D is below', the

' shoul ers C2 C2 of the spring-links C C, when,

by means of a small hook or other suitable in strument inserted in the recesssa" besiderthe spring-links C C in the slots a, the springhnks C Care lifted outward in the slots af* until they will clear the oiisets or shoulders a ai i'n said slots and contact with said spring'f D when the spring i) is released, the upper end thereof contacting with the under sideof the shoulders C2 of the spring-links C, which forces them and the bits B B, attached to their lower ends, upward until theupper endsof the bits B B eontact with the underout shoulders A in the collar ai.

'In o eration the reamer is secured upon the too -stem of. the drilling-rig. D is compressed until the bits BB are below the offset or shoulders as in the. bottom` of' the channels o in the lower -end of the remuer, when the bits are pressed toward each other and the reamcr inserted in the upper end ,oli the Welleasin,lr and lowered down below the casing. When the casing has' not been pre viously lowered to the bottom oi' the lufstreamed portion oi"- the well; the lbits of this reame-r will expand immediately on leaving the bottom end oi the casing, and as the rcamer is lowered the spring l) will draw the.

bits B B upward until their upper ends contact withthe shoulders A in the eollar n, WhereJ they will stay until the reameris raised upward until the upper ends of the bits l l contact with the lower end oi' the Wella-using, which i'orees them downward on the. body portion A as it is raised upward,'the wedged channels a d" drawing the bits 'inward until their upper ends are below the shoulders or The spring` sisma offsets a in the bottoms of the channels a,

when the bits B B will pass upward through the casing. When the casing has been reviously lowered to the bottom f the ten remned portion of the well, it can first be raised sufficiently to give working space for the rearner to commence work. b

H avlng thus described this. invention' so as to enable others to construct and operate the same, what is claimed as new and desired to y be secured by Letters Patent of the United States is- 1. lihe combination in a well-reamer of a body portion ada ted to be secured to a drillstem, and provi ed with longitudinal'slots therein, a collar on the lower portion of said body portion, shoulders on the lower fare of said collar, inclined ways below said shoulders, bits operatingr vertically in said inclined ways and against said shoulders, a spiral spring.,r seated .u on said collar, mechanism actuated by sal spring to retain said bits in a normally upward and expanded position, substantially as described.

2Q The combination in a well-reamer of a body portion ada )ted to be secured to a drillstem, and provi ed with longitudinal slots' therein, a collar adjacent to the lower end thereof, undercut shoulders on said collar, inclined ways below said shoulders, bits operating: vertically in Said inelinedways and against said undercut shoulders, links having shoulders on their upper ends removably- HOWARD R. HAR DENBURG.

FRIEDRICH `SAGER'. l Witnesses:

M. C. SLoAN, JoNAs l. SMITH.

8o seeured to said bits and resting m sald long1- 

